Title:
CHECK VALVE WITH ADJUSTABLE CUTOFF DIRECTION
Document Type and Number:
WIPO Patent Application WO/2020/051965
Kind Code:
A1
Abstract:
Disclosed is a check valve with an adjustable cutoff direction, the check valve comprising a first housing (10) and a second housing (50) connected to each other, wherein a first through hole (15) is provided in the first housing (10); a first valve core (16) slidably fitted with the first through hole (15), and a first spring (19) pressing against the first valve core (16), wherein a second through hole (55) is provided in the second housing (50), a second connection hole (14) in communication with the second through hole (55) is provided in the first housing (10), and a fourth connection hole (54) in communication with the first through hole (15) is provided in the second housing (50), with the second connection hole (14) and the fourth connection hole (54) being in communication with each other; and a second valve core (56) slidably fitted with the second through hole (55), and a second spring (59) pressing against the second valve core (56), wherein the second valve core (56) can seal the second connection hole (14), and the first valve core (16) can seal the fourth connection hole (54). The check valve further comprises a first pull rod (18) connected to the first valve core (16), wherein the first pull rod (18) can be pulled outwards and fixed; and a second pull rod (58) connected to the second valve core (56), wherein the second pull rod (58) can be pulled outwards and fixed. The check valve can easily control the forward and backward flow of an oil liquid.
Inventors:
QIU MEI (CN)
Application Number:
PCT/CN2018/109866
Publication Date:
March 19, 2020
Filing Date:
October 11, 2018
Export Citation:
Assignee:
SUZHOU DANDUN ELECTROMECHANICAL CO LTD (CN)
International Classes:
F16K15/08
Foreign References:
| CN108869849A | 2018-11-23 | |||
| CN109027338A | 2018-12-18 | |||
| CN109027337A | 2018-12-18 | |||
| CN109083876A | 2018-12-25 | |||
| CN108980422A | 2018-12-11 | |||
| CN207131916U | 2018-03-23 | |||
| CN206846000U | 2018-01-05 | |||
| US4458717A | 1984-07-10 | |||
| US4974628A | 1990-12-04 | |||
| EP1148282A2 | 2001-10-24 |
Attorney, Agent or Firm:
SUZHOU WISTONG INTELLECTUAL PROPERTY AGENCY (COMMON PARTNERSHIP) (CN)
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